We have unraveled a physiological mechanism by which plants utilize a proton pyrophosphatase (H+-PPase) transporter to alter root activity and nutrient and water uptake. We have shown enhanced nutrient use efficiency under greenhouse and field conditions for plants genetically modified using molecular techniques, including romaine lettuce. However, consumers remain disinclined to accept food crops modified using molecular approaches. More recently, in preliminary screening we have found variation in transporter expression among existing lettuce lines, suggesting a prospect for achieving enhanced nutrient efficiency using traditional breeding techniques. Despite its potential as a groundbreaking advance in nutrient and water management, no efforts have been made to explore natural variation in H+-PPase expression in any crop species. The objective of this research is to screen lettuce lines for H+-PPase expression and identify breeding lines that can be used to develop more nutrient efficient iceberg lettuce types.
|Effective start/end date||10/27/11 → 9/30/12|
- Arizona Department of Agriculture: $12,000.00